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MFG:ADI D/C:09
Part Number: ADM1085
MFG: ADI
D/C: 09
Description: The ADM1085/ADM1086/ADM1087/ADM1088 are simplesequencing circuits that provide a time delay betw...
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ADM1085
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DataSheet
General Description
ADM1085 General Description
The ADM1085/ADM1086/ADM1087/ADM1088 are simple sequencing circuits that provide a time delay between the enabling of voltage regulators and/or dc-dc converters at powerup in multiple supply systems. When the output voltage of the first power module reaches a preset threshold, a time delay is initiated before an enable signal allows subsequent regulators to power up. Any number of these devices can be cascaded with regulators to allow sequencing of multiple power supplies.
Threshold levels can be set with a pair of external resistors in a voltage divider configuration. By choosing appropriate resistor values, the threshold can be adjusted to monitor voltages as low as 0.6 V. The simple sequencers are specified over the extended −40°C to +125°C temperature range. With low current consumption of 15 µA (typ) and 6-lead SC70 packaging, the parts are suitable for low-power portable applications.
ADM1085 Maximum Ratings
Parameter Rating
VCC −0.3 V to +6 V
VIN −0.3 V to +25 V
CEXT −0.3 V to +6 V
ENIN, ENIN −0.3 V to +25 V
ENOUT, ENOUT (ADM1085, ADM1087) −0.3 V to +25 V
ENOUT, ENOUT (ADM1086, ADM1088) −0.3 V to +6 V
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
JA Thermal Impedance, SC70 146°C/W
Lead Temperature
Soldering (10 s) 300°C
Vapor Phase (60 s) 215°C
Infrared (15 s) 220°C
VCC −0.3 V to +6 V
VIN −0.3 V to +25 V
CEXT −0.3 V to +6 V
ENIN, ENIN −0.3 V to +25 V
ENOUT, ENOUT (ADM1085, ADM1087) −0.3 V to +25 V
ENOUT, ENOUT (ADM1086, ADM1088) −0.3 V to +6 V
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
JA Thermal Impedance, SC70 146°C/W
Lead Temperature
Soldering (10 s) 300°C
Vapor Phase (60 s) 215°C
Infrared (15 s) 220°C
ADM1085 Features
Provide programmable time delays between enable signals
Can be cascaded with power modules for multiple supply sequencing
Power supply monitoring from 0.6 V
Output stages:
High voltage (up to 22 V) open-drain output (ADM1085/ADM1087)
Push-pull output (ADM1086/ADM1088)
Capacitor-adjustable time delays
High voltage (up to 22 V) Enable and VIN inputs
Low power consumption (15 µA)
Specified over 40°C to +125°C temperature range
6-lead SC70 package
Can be cascaded with power modules for multiple supply sequencing
Power supply monitoring from 0.6 V
Output stages:
High voltage (up to 22 V) open-drain output (ADM1085/ADM1087)
Push-pull output (ADM1086/ADM1088)
Capacitor-adjustable time delays
High voltage (up to 22 V) Enable and VIN inputs
Low power consumption (15 µA)
Specified over 40°C to +125°C temperature range
6-lead SC70 package
ADM1085 Typical Application
Desktop/notebook computers, servers
Low power portable equipment
Routers
Base stations
Line cards
Graphics cards
Low power portable equipment
Routers
Base stations
Line cards
Graphics cards
ADM1085 Connection Diagram
ADM1085
PDF/DataSheet Download
- Datasheet: ADM1085
- File Size: 306661 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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